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Sony A7R III vs Fujifilm GFX 100 Comparison

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Sony A7R III

42 MP | Full frame (35.9 x 24 mm) BSI-CMOS Sensor

Sony A7R III
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Fujifilm GFX 100

102 MP | Medium format (44 x 33 mm) BSI-CMOS Sensor

Fujifilm GFX 100
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Sony A7R III vs Fujifilm GFX 100 Comparison Overview

In this review, we will be comparing A7R III and GFX 100, two Pro Mirrorless cameras from Sony and Fujifilm. Sony A7R III has a 42.0MP Full frame sensor whereas Fujifilm GFX 100 has a 102.0MP Medium format sensor. Sony A7R III was introduced to market in October 2017 and Fujifilm GFX 100 was launched in May 2019. There is 19 months difference between A7R III and GFX 100 so we don't expect to see a huge technology difference between these two cameras but it would still give an advantage to younger GFX 100, especially in sensor tech.

We can expect this to be a close match up because both models are ranked amongst the best in Pro Mirrorless cameras. Out of 53 cameras in this class, Sony A7R III is ranked #6 with an overall score of 94 and Fujifilm GFX 100 is ranked #1 with an overall score of 100.

Here is a brief look at the main features of Sony A7R III and Fujifilm GFX 100 before getting into our more detailed comparison.

Sony A7R III Key Specs

  • Announcement Date: 2017-10-25
  • 42MP - Full frame BSI-CMOS Sensor
  • No Anti-aliasing (AA) filter
  • ISO 100 - 32000 ( expands to 50-102400)
  • Sony E Mount
  • Sensor-shift Image Stabilization
  • 3 Tilting Screen
  • 3686k dot Electronic viewfinder
  • 10.0 fps continuous shooting
  • 4K (UHD) - 3840 x 2160 video resolution
  • Built-in Wireless
  • 657g. 127 x 96 x 74 mm
  • Weather Sealed Body
  • Replaced Sony Alpha 7R II Compare

Fujifilm GFX 100 Key Specs

  • Announcement Date: 2019-05-23
  • 102MP - Medium format BSI-CMOS Sensor
  • ISO 100 - 12800 ( expands to 50-102400)
  • Fujifilm G Mount
  • Sensor-shift Image Stabilization
  • 3.2" Tilting Screen
  • 5760k dot Electronic viewfinder
  • 5.0 fps continuous shooting
  • 4K (DCI) - 4096 x 2160 video resolution
  • Built-in Wireless
  • 1320g. 156 x 164 x 103 mm
  • Weather Sealed Body

Sony A7R III was replaced by Sony Alpha A7R IV. You may also be interested in these comparisons:
Sony Alpha A7R IV vs Sony Alpha A7R III
Sony Alpha A7R IV vs Fujifilm GFX 100

Let's read on the following sections in order to better understand in detail how Sony A7R III and Fujifilm GFX 100 compares and hopefully end up with enough arguments to decide which one is better for you.

Reasons to choose Sony Alpha A7R III over Fujifilm GFX 100
Max ISO
32.000 vs 12.800 150% higher Max ISO
Max Mech. Shutter
1/8000s vs 1/4000s faster mechanical shutter
Continuous Shooting
10.0fps vs 5.0fps 5 fps faster
Weight
657 g vs 1320 g 663 g lighter
Sensor Pixel Area
20.43µm2 vs 14.52µm2 40% larger pixel area
NFC Connection
Yes vs No Easy wireless connectivity with compatible devices
Autofocus at f/8 aperture
425 points vs none Autofocus with teleconverters
Animal Eye AF Tracking
Yes vs No Easily lock and track focus on animals
Anti Flicker
Yes vs No Reduced uneven color and exposure under flickering light
Eye Tracking Focus
Yes vs No Autofocus system locks on the eye and tracks the subject


Reasons to choose Fujifilm GFX 100 over Sony Alpha A7R III
Viewfinder Magnification
1.09x vs 0.78x Larger Viewfinder
Max Sensor Resolution
102 MP vs 42 MP 142% more pixels
LCD Screen Size
3.2" vs 3 0.2 inches larger display
LCD Screen Resolution
2.360k dots vs 1.440k dots 63% higher resolution screen
Battery Life
800 shots vs 650 shots 150 more frames with a single charge
Viewfinder Resolution
5760k dot vs 3686.4k dot 56% higher resolution
Max Video Resolution
4096 x 2160 vs 3840 x 2160 Higher Resolution Video
Top LCD
Yes vs No Help viewing and changing settings easily
Tilting Viewfinder
Yes vs No Use viewfinder in different angles

Common Strengths of Sony Alpha A7R III and Fujifilm GFX 100
Wireless Connection
Yes vs Yes Better connectivity
Bluetooth Connection
Yes vs Yes Connect to other devices via Bluetooth
Image Stabilization
Sensor-shift vs Sensor-shift Sharper images at longer focal lengths and long exposures
Adjustable LCD Screen
Tilting vs Tilting Flexible shooting positions
External Flash Shoe
Yes vs Yes Better for flash photography
Touch Screen
Yes vs Yes Easy control of camera functions
Viewfinder
Yes (Electronic) vs Yes (Electronic) Better framing and control
RAW Support
Yes vs Yes Better image quality
Face Detection Focus
Yes vs Yes very handy for portraits
Max Resolution
42 MP vs 102 MP Bigger prints and more details
LCD Screen Size
3 vs 3.2" Large display
LCD Screen Resolution
1.440k dots vs 2.360k dots High resolution screens
Microphone Port
Yes vs Yes High quality audio recording option
Headphone Port
Yes vs Yes better video control
Environmental Sealing
Yes vs Yes shoot at tough conditions
Timelapse Recording
Yes vs Yes creative shooting
AE Bracketing
Yes vs Yes Useful for tough lighting conditions and HDR
Flash Sync Port
Yes vs Yes Connect off-camera flash
Storage Slot
2 vs 2 Extra Storage Slot
Smartphone Remote
Yes vs Yes Remote control your camera with a smartphone
UHS Card Support
UHS-II vs UHS-II Read/Write in Ultra High Speeds
Webcam Function
Yes vs Yes Use your camera as a Webcam
Common Weaknesses of Sony Alpha A7R III and Fujifilm GFX 100
Built-in Flash
No vs No Require external flash
Sony A7R III vs Fujifilm GFX 100: Physical Specs and Body features Comparison

Size and weight is a big decision factor when you are trying to find the ideal camera for your needs. In this section, We are going to illustrate Sony A7R III and Fujifilm GFX 100 side-by-side from the front, back and top in their relative dimensions. Sony A7R III has external dimensions of 127 x 96 x 74 mm (5 x 3.78 x 2.91″) and weighs 657 g (1.45 lb / 23.17 oz) (including batteries). Fujifilm GFX 100 has external dimensions of 156 x 164 x 103 mm (6.14 x 6.4 x 4.1″) and weighs 1320 g (2.91 lb / 46.56 oz) (including batteries).

Below you can see the front view size comparison of Sony A7R III and Fujifilm GFX 100. Sony A7R III is clearly the smaller of the two cameras. Its body is 29mm narrower, 68mm shorter and 29mm thinner than Fujifilm GFX 100.

Sony A7R III vs Fujifilm GFX 100 Camera Size Comparison - Front View
Comparison image of Sony A7R III and Fujifilm GFX 100 Size, Weight and External Dimensions - Front View

Here is the back view size comparison of Sony A7R III and Fujifilm GFX 100.

Sony A7R III vs Fujifilm GFX 100 Camera Size Comparison - Back View
Comparison image of Sony A7R III and Fujifilm GFX 100 Size and Weight - Back View

Now lets look at the top view comparison of Sony A7R III and Fujifilm GFX 100.
Sony A7R III vs Fujifilm GFX 100 Camera Size Comparison - Top View
Top View Comparison image of Sony A7R III and Fujifilm GFX 100 Size

Weight is another important factor especially when deciding on a camera that you want to carry with you all day. Sony A7R III is significantly lighter (663g ) than the Fujifilm GFX 100 which may become a big advantage especially on long walking trips.

Also keep in mind that body weight is not the only deciding factor when comparing two interchangeable camera bodies, you have to also take into account the lenses that you will be using with these bodies. Since Fujifilm GFX 100 has a Medium format sensor and Sony A7R III has a smaller Full frame sensor, Sony A7R III's lenses for a similar focal length and aperture will generally be lighter and smaller than the Fujifilm GFX 100 lenses.

Weight Comparison

Mirrorless Cameras

A7R III
GFX 100
Min
Average
Max
Thickness Comparison

Mirrorless Cameras

A7R III
GFX 100
Min
Average
Max

Weather Sealing

Both A7R III and GFX 100 have weather sealings in their body, making them resistant to water and dust.

LCD Screen Size and Features

Fujifilm GFX 100's 3.2" LCD screen is slightly larger than Sony A7R III's 3 screen.

Sony A7R III vs Fujifilm GFX 100: Sensor Comparison

Sony A7R III has a 42.0MP Full frame (35.9 x 24 mm ) sized BSI-CMOS sensor and features Bionz X processor. On the other hand, Fujifilm GFX 100 has a 102.0MP Medium format (44 x 33 mm ) sized BSI-CMOS sensor and features X-Processor 4 processor.

Fujifilm GFX 100's sensor provides 60MP more than Sony A7R III's sensor, which gives a significant advantage in real life. You can print your images larger or crop more freely. On the other hand, please keep in mind that Max sensor resolution is not the only determinant of resolving power. Factors such as the optical elements, low pass filter, pixel size and sensor technology also affects the final resolution of the captured image.

Another difference between these two cameras is that Sony A7R III's sensor lacks anti-alias (Low-Pass) filter. Removing anti-alias filter increases the sharpness and level of detail but at the same time, it increases the chance of moire occurring in certain scenes.

Below you can see the A7R III and GFX 100 sensor size comparison.

Sony A7R III vs Fujifilm GFX 100 Sensor Size Comparison
Sensor Size and Resolution Comparison image of Sony A7R III and Fujifilm GFX 100 Cameras


As seen above, Fujifilm GFX 100 has a 1.7x Larger sensor area than Sony A7R III. Larger sensors give photographer more control on the depth of field and blurry background compared to smaller sensor when shot in same focal length and aperture.

Sony A7R III vs Fujifilm GFX 100 Comparison of Available Lenses
Which camera has more lenses?

Number of available lenses is a big decision factor while choosing your interchangeable lens camera. When we look at the available lenses for these two cameras, we see that Sony A7R III has an advantage over Fujifilm GFX 100. There are 137 lenses for Sony A7R III's Sony E mount, on the other hand there are only 13 lenses for Fujifilm GFX 100's Fujifilm G lens mount.

Another important factor is the availability of image stabilization. Both Sony A7R III and Fujifilm GFX 100 has Sensor based Image stabilization which means that all the lenses will be stabilized in these bodies. A7R III's built-in Image stabilization system is effective to compensate vibration up to 5.0-stops according to CIPA standards.

Lens Type # of Sony A7R III Lenses # of Fujifilm GFX 100 Lenses
Standard Zoom 13 (10 Full Frame) n/a
Standard Prime 20 (10 Full Frame) 3
Wideangle Zoom 8 (7 Full Frame) 1
Wideangle Prime 44 (28 Full Frame) 4
Telephoto Zoom 10 (8 Full Frame) 2
Telephoto Prime 19 (15 Full Frame) 3
SuperZoom 9 (2 Full Frame) n/a
Wideangle Fisheye Prime 2 (0 Full Frame) n/a
Macro Prime 8 (7 Full Frame) n/a
Perspective Control Prime 2 (2 Full Frame) n/a
Telephoto Mirror Prime n/a n/a
TOTAL 137 (89 Full Frame) 13

What types of Photography are Sony A7R III and Fujifilm GFX 100 Good for?
In this section, we rank and compare Sony A7R III and Fujifilm GFX 100 for five different photography types in order to make your decision process easier in case you are specifically interested in one or more of these areas.

Sony A7R III for Portrait Photography

GOOD

Fujifilm GFX 100 for Portrait Photography

EXCELLENT
Large Full frame (35.9 x 24 mm) sensor
Very High Resolution Sensor: 42.0MP
Image Stabilization
Electronic Built-in Viewfinder
Good Ergonomics&Handling
Read the details
Large Medium format (44 x 33 mm) sensor
Very High Resolution Sensor: 102.0MP
Image Stabilization
Electronic Built-in Viewfinder
Good Ergonomics&Handling
Read the details

Sony A7R III for Street Photography

EXCELLENT

Fujifilm GFX 100 for Street Photography

EXCELLENT
Large Full frame (35.9 x 24 mm) sensor
Image Stabilization
Electronic Built-in Viewfinder
Live-view
Face-Detection Focusing
Tilting LCD Screen
Medium sized Body
Read the details
Large Medium format (44 x 33 mm) sensor
Image Stabilization
Electronic Built-in Viewfinder
Live-view
Face-Detection Focusing
Tilting LCD Screen
Medium sized Body
Read the details

Sony A7R III for Sports Photography

GOOD

Fujifilm GFX 100 for Sports Photography

GOOD
Image Stabilization
Electronic Built-in Viewfinder
Good Ergonomics&Handling
Fast Continuous Shooting: 10.0fps
Anti Flicker feature
Environmental Sealings
Fast Max shutter speed: 1/8000s
425 Focus Points
Good Battery Life: 650 shots
Good Low Light ISO
Wireless Connection
Read the details
Image Stabilization
Electronic Built-in Viewfinder
Good Ergonomics&Handling
Environmental Sealings
Fast Max shutter speed: 1/4000s
425 Focus Points
Good Battery Life: 800 shots
Wireless Connection
Average Continuous Shooting: 5.0fps
Read the details

Sony A7R III for Daily Photography

EXCELLENT

Fujifilm GFX 100 for Daily Photography

EXCELLENT
Large Full frame (35.9 x 24 mm) sensor
Anti Flicker feature
Environmental Sealings
Medium size Body
657g
Body Thickness 74mm
Read the details
Large Medium format (44 x 33 mm) sensor
Environmental Sealings
Medium size Body
1320g
Body Thickness 103mm
Read the details

Sony A7R III for Landscape Photography

GOOD

Fujifilm GFX 100 for Landscape Photography

EXCELLENT
Large Full frame (35.9 x 24 mm) sensor
Very High Resolution Sensor: 42.0MP
Environmental Sealings
Live-view
Read the details
Large Medium format (44 x 33 mm) sensor
Very High Resolution Sensor: 102.0MP
Environmental Sealings
Live-view
Read the details

Sony A7R III vs Fujifilm GFX 100: OUR DECISION

You may have already made your decision about which camera suits better for your needs and your budget so far but in case you wonder how we rated Sony A7R III and Fujifilm GFX 100, below you can find their scores in five different aspects. Our Decision Algorithm dynamically scores cameras using 63 different specs, current price and DxO Mark scores (where possible) in order to make a more objective and consistent comparison.

Here is a summary of how Sony A7R III and Fujifilm GFX 100 scores compare:

Sony A7R III
Imaging
Features
Value
Portability
Overall
Ranked #6 out of 88 in SLR-style mirrorless cameras
Ranked #6 out of 1223 in all Cameras
Fujifilm GFX 100
Imaging
Features
Value
Portability
Overall
Ranked #1 out of 88 in SLR-style mirrorless cameras
Ranked #1 out of 1223 in all Cameras

Fujifilm GFX 100 has a higher Overall Score thanks to its better image quality and more features compared to Sony A7R III. On the other hand the Sony A7R III beats Fujifilm GFX 100 in two significant areas: Value for Money and Compactness.
If you are a price conscious buyer and looking for a small and relatively low priced camera where you can take everywhere with you, Sony A7R III is the right choice for you.
If you are after the better photographic performance with all the advanced features, definitely get the Fujifilm GFX 100

Sony A7R III
Sony A7R III
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Fujifilm GFX 100
Fujifilm GFX 100
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Fujifilm GFX 100 vs Sony A7R III Specs Table
Detailed comparison of specifications
General Sony Alpha A7R III Fujifilm GFX 100
Brand Sony Fujifilm
Announced 2017-10-25 2019-05-23
Body Type SLR-style mirrorless SLR-style mirrorless
Sensor
Type BSI-CMOS BSI-CMOS
Size Full frame Medium format
Dimensions 35.9 x 24 mm 44 x 33 mm
Area 861.60mm2 1452.00mm2
Megapixels 42 megapixels 102 megapixels
Max Resolution 7952 x 5304 11648 x 8736
Max Native Light sensitivity 32,000 ISO 12,800 ISO
Max Boosted Light Sensitivity 102400 ISO 102400 ISO
Min Native Light sensitivity 100 ISO 100 ISO
Min Boosted Light Sensitivity 50 ISO 50 ISO
RAW Support
Autofocus
AF Touch
AF Continuous
AF Single
AF Tracking
AF Selective
AF Center
AF Multi Area
AF Live View
AF Face Detection
AF Contrast Detection
AF Phase Detection
Number of Focus Points 425 425
Lens
Manual Focus
Lens Mount Sony E Fujifilm G
Number of Available Lenses 137 13
Screen
Type Tilting Tilting
Size 3 3.2"
Resolution 1,440k dots 2,360k dots
Touch Screen
Viewfinder
Viewfinder Electronic Electronic
Viewfinder Resolution 3,686k dots 5,760k dots
Viewfinder Coverage 100% 100%
Viewfinder Magnification 0.78x 1.09x
Photography Features
Max Mechanical Shutter 1/8000s 1/4000s
Max Electronic Shutter n/a 1/16000s
Shutter Priority
Aperture Priority
Manual Exposure Mode
Custom White Balance
Image Stabilization Sensor-shift Sensor-shift
Built-in Flash
Max Flash Sync n/a 1/125s
External Flash
Continuous Shooting 10.0 fps 5.0 fps
Multi-Segment
Average
Spot
Partial
AF-Area
Center Weighted
AE Bracketing
WB Bracketing
Video Features
Max Video Resolution 3840 x 2160 4096 x 2160
Video Formats MPEG-4, AVCHD, XAVC S MPEG-4, H.264, H.265
Microphone Port
Headphone Port
Connectivity
Wireless Connectivity Built-In Built-In
HDMI
Physical
Environmental Sealing
Weight 657g 1320g
Dimensions 127 x 96 x 74mm 156 x 164 x 103mm
Battery Life 650 shots 800 shots
Other Features
Timelapse Recording
GPS None None
DxO Sensor Scores
DxO Overall Score 100 not tested
DxO Color Depth 26.0 not tested
DxO Dynamic Range 14.7 not tested
DxO Low Light ISO 3523 not tested
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